27749345 has 8 divisors (see below), whose sum is σ = 35860776. Its totient is φ = 20491776.

The previous prime is 27749311. The next prime is 27749353. The reversal of 27749345 is 54394772.

It can be written as a sum of positive squares in 4 ways, for example, as 50176 + 27699169 = 224^2 + 5263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27749345 - 2¹⁰ = 27748321 is a prime.

It is a super-2 number, since 2×27749345² = 1540052295858050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213392 + ... + 213521.

It is an arithmetic number, because the mean of its divisors is an integer number (4482597).

Almost surely, 2^27749345 is an apocalyptic number.

It is an amenable number.

27749345 is a deficient number, since it is larger than the sum of its proper divisors (8111431).

27749345 is a wasteful number, since it uses less digits than its factorization.

27749345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426931.

The product of its digits is 211680, while the sum is 41.

The square root of 27749345 is about 5267.7647062108. The cubic root of 27749345 is about 302.7500652906.

The spelling of 27749345 in words is "twenty-seven million, seven hundred forty-nine thousand, three hundred forty-five".